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        Genomics Precision Diagnostic > Dermatology Precision Panel > Oculocutaneous Albinism Precision Panel

        Oculocutaneous Albinism Precision Panel

        Albinism is a group of inherited abnormalities of melanin synthesis and are characterized by a decrease or absence of melanin pigment. There are several types of albinism, one of them being oculocutaneous albinism (OCA). 
        Overview
        Indication
        Clinical Utility
        Genes & Diseases
        Methodology
        References

        Overview

        • Albinism is a group of inherited abnormalities of melanin synthesis and are characterized by a decrease or absence of melanin pigment. There are several types of albinism, one of them being oculocutaneous albinism (OCA). OCA is an autosomal recessive disease of melanin biosynthesis which leads to complete or partial loss of melanin in the skin, hair follicles and eyes. This is due to mutations in genes encoding for enzymes responsible for melanin synthesis. The clinical symptoms and the course of the disease show a pronounced variability, this is due to different gene mutations affecting various points along the melanin pathway. Some of the manifestations include nystagmus, iris hypopigmentation and translucency, reduced pigmentation of the retina, reduced visual acuity etc. They are prone to deleterious effects of ultraviolet light, and therefore increased susceptibility to develop actinic keratosis, squamous cell carcinoma and basal cell carcinoma.  

        • The Igenomix Oculocutaneous Albinism Precision Panel can be used to make an accurate and directed diagnosis ultimately leading to a better management and prognosis of the disease. It provides a comprehensive analysis of the genes involved in this disease using next-generation sequencing (NGS) to fully understand the spectrum of relevant genes involved.

        Indication

        • The Igenomix Oculocutaneous Albinism Precision Panel is indicated for those patients with a clinical suspicion or diagnosis with or without the following manifestations: 
          • Pinkish-coloured skin 
          • Blue-gray irides 
          • White hair 
          • Prominent red reflex 
          • Poor visual acuity 
          • Photophobia 
          • Nystagmus 
          • Foveal hypoplasia 

        Clinical Utility

        The clinical utility of this panel is: 

        • The genetic and molecular confirmation for an accurate clinical diagnosis of a symptomatic patient. Patient education on preventive sun exposure measures.    
        • Early initiation of protection from sunlight in form of sunscreen and sun-avoidance methods. Surveillance for early detection of neoplasms and ophthalmology consultations. 
        • Risk assessment and genetic counselling of asymptomatic family members according to the mode of inheritance.

        Genes & Diseases

        Methodology

        References

        See scientific referrals

        Kubasch, A. S., & Meurer, M. (2017). Okulokutaner und okulärer Albinismus [Oculocutaneous and ocular albinism]. Der Hautarzt; Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete, 68(11), 867–875. https://doi.org/10.1007/s00105-017-4061-x 

        Grønskov, K., Ek, J., & Brondum-Nielsen, K. (2007). Oculocutaneous albinism. Orphanet journal of rare diseases, 2, 43. https://doi.org/10.1186/1750-1172-2-43 

        Kamaraj, B., & Purohit, R. (2014). Mutational analysis of oculocutaneous albinism: a compact review. BioMed research international, 2014, 905472. https://doi.org/10.1155/2014/905472 

        Yang, Q., Yi, S., Li, M., Xie, B., Luo, J., Wang, J., Rong, X., Zhang, Q., Qin, Z., Hang, L., Feng, S., & Fan, X. (2019). Genetic analyses of oculocutaneous albinism types 1 and 2 with four novel mutations. BMC medical genetics, 20(1), 106. https://doi.org/10.1186/s12881-019-0842-7 

        Okulicz, J. F., Shah, R. S., Schwartz, R. A., & Janniger, C. K. (2003). Oculocutaneous albinism. Journal of the European Academy of Dermatology and Venereology : JEADV, 17(3), 251–256. https://doi.org/10.1046/j.1468-3083.2003.00767.x 

        Summers CG. Albinism: classification, clinical characteristics, and recent findings. Optom Vis Sci. 2009 Jun.  

        Goldberg, R. A., Lally, D. R., & Heier, J. S. (2015). Oculocutaneous albinism. JAMA ophthalmology, 133(3), e143518. https://doi.org/10.1001/jamaophthalmol.2014.3518 

         

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